Chrome，
QQ浏览器
-
-
-
播放：0 时间：2025-09-15简介： -
-
-
-
-
-
![北师大数学八上《2.2算术平方根》[代老师]【市一等奖】优质课](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F3eac0a65e2cda6b8ec1db17eae54634c37f585f3.jpg%40672w_378h_1c_%21web-search-common-cover)
-
-
-
-
-
-
-
-
-
播放：0 时间：2025-08-24简介：
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
![北师大数学八上《2.2算术平方根》[代老师]【市一等奖】优质课](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F3eac0a65e2cda6b8ec1db17eae54634c37f585f3.jpg%40672w_378h_1c_%21web-search-common-cover)
.